As mentioned, you can't go wrong with just about any groupset, in terms of reliability and performance.

For touring, I would suggest SRAM Apex. Pulled from a review:

"... made up of a compact 50/34t crankset mated to an 11-32t 10-speed cassette. This package gives the now familiar top gear of 50/11 or 119.9 gear inches and a mountain bike-esque 34/32 low gear or 28 gear inches. This allows any cycling enthusiast who currently rides a double crankset to scale the steepest of hills with a never-before-experienced ease – albeit quite slowly, depending on one’s ability to maintain a high cadence."

Apex will give you plenty of top-end gear for downhills and tailwind. I am generally not a big fan of ultra low gearing, but if you are doing tons of climbing, I imagine having the low gears will help save your knees.